On 1/7/18 3:45 AM, Ido Schimmel wrote:
> Similar to IPv4, when the carrier of a netdev changes we should toggle
> the 'linkdown' flag on all the nexthops using it as their nexthop
> device.
>
> This will later allow us to test for the presence of this flag during
> route lookup and dump.
>
> Up until commit 4832c30d5458 ("net: ipv6: put host and anycast routes on
> device with address") host and anycast routes used the loopback netdev
> as their nexthop device and thus were not marked with the 'linkdown'
> flag. The patch preserves this behavior and allows one to ping the local
> address even when the nexthop device does not have a carrier and the
> 'ignore_routes_with_linkdown' sysctl is set.
>
> Signed-off-by: Ido Schimmel <[email protected]>
> ---
> include/net/ip6_route.h | 1 +
> net/ipv6/addrconf.c | 2 ++
> net/ipv6/route.c | 23 +++++++++++++++++------
> 3 files changed, 20 insertions(+), 6 deletions(-)
Acked-by: David Ahern <[email protected]>
